Docker Image Journey - How to Shrink a Docker Image
summary
The talk explains how a team reduced a Docker image from ~100 MB to ~5 MB by using multi-stage builds to produce statically linked binaries and then publishing from scratch (minimal) base images. It covers the concrete trade-offs: much faster pulls/pushes and a smaller attack surface because runtimes and shells are removed, but increased build complexity, necessary CI changes, image scanning, documented rebuild steps, and extra operational tooling to support debugging.
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chapters (10)
- 0:00Docker image optimization
- 4:06Shrink goals
- 7:13Multi-stage builds
- 10:08100MB to 5MB
- 13:57Scratch vs base images
- 15:53Live build & deploy
- 18:33Debugging tooling
- 20:39Security trade-offs
- 23:50Results impact
- 26:54Conclusion
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